high. for mitt romney, some are saying it's make or break. for the president, it's about not letting his challenger back in the race. president obama is in nevada this morning when he'll spend the next three days in debate camp. and he heads into the debate with the latest gallup tracking poll still showing president obama showing a lead this morning, 6 points. >> if romney doesn't do well in this debate it will be hard to get back in this race. >> mitt romney has to avoid be appearing detached. his to-do list, the three cs show compassion, that he's competent and that he indeed can connect to voters. >> on those three cs, that's where he's got to really do well. >> reporter: while they lead in the polls, team obama know that debates can be a game-changer. he needs to avoid appearing irritable aor impatient. >> they need him to answer questions short, concise. >> the pressure is on for this debate. it could be a huge audience. anywhere between 50 million to 65 million may tune in to see these two men square off on wednesday night. >> david, great to see you live. >>> let's bring in "